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btrfs-progs: list-chunks: add sorting by length

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Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2023-07-13 23:38:39 +02:00
parent 73c5ad0d70
commit 3d17609d66
1 changed files with 56 additions and 1 deletions
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57
cmds/inspect.c
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@ -699,7 +699,14 @@ static const char * const cmd_inspect_list_chunks_usage[] = {
"Show chunks (block groups) layout for all devices",
"",
HELPINFO_UNITS_LONG,
OPTLINE("--sort MODE", "sort by a column ascending: pstart, lstart, usage (default: pstart)"),
OPTLINE("--sort MODE", "sort by a column ascending (default: pstart), "
"MODE can be one of: "
"pstart - physical offset, grouped by device, "
"lstart - logical offset, "
"usage - by chunk usage (implies --usage), "
"length_p - by chunk length, secondary by physical offset, "
"length_l - by chunk length, secondary by logical offset"
),
OPTLINE("--usage", "show usage per block group (note: this can be slow)"),
OPTLINE("--no-usage", "don't show usage per block group"),
OPTLINE("--empty", "show empty space between block groups"),
@ -711,6 +718,10 @@ enum {
CHUNK_SORT_PSTART,
CHUNK_SORT_LSTART,
CHUNK_SORT_USAGE,
/* Length, secondary physical start */
CHUNK_SORT_LENGTH_P,
/* Length, secondary logical start */
CHUNK_SORT_LENGTH_L,
CHUNK_SORT_DEFAULT = CHUNK_SORT_PSTART
};
@ -789,6 +800,40 @@ static int cmp_cse_devid_usage(const void *va, const void *vb)
return 0;
}
static int cmp_cse_length_physical(const void *va, const void *vb)
{
const struct list_chunks_entry *a = va;
const struct list_chunks_entry *b = vb;
if (a->length < b->length)
return -1;
if (a->length > b->length)
return 1;
if (a->start < b->start)
return -1;
if (a->start > b->start)
return 1;
return 0;
}
static int cmp_cse_length_logical(const void *va, const void *vb)
{
const struct list_chunks_entry *a = va;
const struct list_chunks_entry *b = vb;
if (a->length < b->length)
return -1;
if (a->length > b->length)
return 1;
if (a->lstart < b->lstart)
return -1;
if (a->lstart > b->lstart)
return 1;
return 0;
}
static int print_list_chunks(struct list_chunks_ctx *ctx, unsigned sort_mode,
unsigned unit_mode, bool with_usage, bool with_empty)
{
@ -830,6 +875,12 @@ static int print_list_chunks(struct list_chunks_ctx *ctx, unsigned sort_mode,
else if (sort_mode == CHUNK_SORT_USAGE)
qsort(ctx->stats, ctx->length, sizeof(ctx->stats[0]),
cmp_cse_devid_usage);
else if (sort_mode == CHUNK_SORT_LENGTH_P)
qsort(ctx->stats, ctx->length, sizeof(ctx->stats[0]),
cmp_cse_length_physical);
else if (sort_mode == CHUNK_SORT_LENGTH_L)
qsort(ctx->stats, ctx->length, sizeof(ctx->stats[0]),
cmp_cse_length_logical);
/* Optional usage, two rows for header and separator, gaps */
table = table_create(7 + (int)with_usage, 2 + ctx->length + gaps);
@ -992,6 +1043,10 @@ static int cmd_inspect_list_chunks(const struct cmd_struct *cmd,
} else if (strcmp(optarg, "usage") == 0) {
sort_mode = CHUNK_SORT_USAGE;
with_usage = true;
} else if (strcmp(optarg, "length_p") == 0) {
sort_mode = CHUNK_SORT_LENGTH_P;
} else if (strcmp(optarg, "length_l") == 0) {
sort_mode = CHUNK_SORT_LENGTH_L;
} else {
error("unknown sort mode: %s", optarg);
exit(1);